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Update notes for 2017-11-29

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Alan Orth 2017-11-29 17:26:17 +03:00
parent 96bb2a3ac5
commit b23226a46d
Signed by: alanorth
GPG Key ID: 0FB860CC9C45B1B9
3 changed files with 52 additions and 8 deletions
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21
content/post/2017-11.md
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@ -893,3 +893,24 @@ $ grep 70.32.83.92 dspace.log.2017-11-23 | grep -o -E 'session_id=[A-Z0-9]{32}'
- PostgreSQL activity shows 69 connections
- I don't have time to troubleshoot more as I'm in Nairobi working on the HPC so I just restarted Tomcat for now
- A few hours later Uptime Robot says the server is down again
- I don't see much activity in the logs but there are 87 PostgreSQL connections
- But shit, there were 10,000 unique Tomcat sessions today:
```
$ cat dspace.log.2017-11-29 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
10037
```
- Although maybe that's not much, as the previous two days had more:
```
$ cat dspace.log.2017-11-27 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
12377
$ cat dspace.log.2017-11-28 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
16984
```
- I think we just need start increasing the number of allowed PostgreSQL connections instead of fighting this, as it's the most common source of crashes we have
- I will bump DSpace's `db.maxconnections` from 60 to 90, and PostgreSQL's `max_connections` from 183 to 273 (which is using my loose formula of 90 * webapps + 3)
- I really need to figure out how to get DSpace to use a PostgreSQL connection pool

29
public/2017-11/index.html
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@ -38,7 +38,7 @@ COPY 54701
<meta property="article:published_time" content="2017-11-02T09:37:54&#43;02:00"/>
<meta property="article:modified_time" content="2017-11-26T21:26:13&#43;03:00"/>
<meta property="article:modified_time" content="2017-11-29T10:14:09&#43;03:00"/>
@ -86,9 +86,9 @@ COPY 54701
"@type": "BlogPosting",
"headline": "November, 2017",
"url": "https://alanorth.github.io/cgspace-notes/2017-11/",
"wordCount": "5220",
"wordCount": "5389",
"datePublished": "2017-11-02T09:37:54&#43;02:00",
"dateModified": "2017-11-26T21:26:13&#43;03:00",
"dateModified": "2017-11-29T10:14:09&#43;03:00",
"author": {
"@type": "Person",
"name": "Alan Orth"
@ -1152,6 +1152,29 @@ $ grep -c com.atmire.utils.UpdateSolrStatsMetadata dspace.log.2017-11-19
<ul>
<li>PostgreSQL activity shows 69 connections</li>
<li>I don&rsquo;t have time to troubleshoot more as I&rsquo;m in Nairobi working on the HPC so I just restarted Tomcat for now</li>
<li>A few hours later Uptime Robot says the server is down again</li>
<li>I don&rsquo;t see much activity in the logs but there are 87 PostgreSQL connections</li>
<li>But shit, there were 10,000 unique Tomcat sessions today:</li>
</ul>
<pre><code>$ cat dspace.log.2017-11-29 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
10037
</code></pre>
<ul>
<li>Although maybe that&rsquo;s not much, as the previous two days had more:</li>
</ul>
<pre><code>$ cat dspace.log.2017-11-27 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
12377
$ cat dspace.log.2017-11-28 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
16984
</code></pre>
<ul>
<li>I think we just need start increasing the number of allowed PostgreSQL connections instead of fighting this, as it&rsquo;s the most common source of crashes we have</li>
<li>I will bump DSpace&rsquo;s <code>db.maxconnections</code> from 60 to 90, and PostgreSQL&rsquo;s <code>max_connections</code> from 183 to 273 (which is using my loose formula of 90 * webapps + 3)</li>
<li>I really need to figure out how to get DSpace to use a PostgreSQL connection pool</li>
</ul>

10
public/sitemap.xml
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@ -4,7 +4,7 @@
<url>
<loc>https://alanorth.github.io/cgspace-notes/2017-11/</loc>
<lastmod>2017-11-26T21:26:13+03:00</lastmod>
<lastmod>2017-11-29T10:14:09+03:00</lastmod>
</url>
<url>
@ -134,7 +134,7 @@
<url>
<loc>https://alanorth.github.io/cgspace-notes/</loc>
<lastmod>2017-11-26T21:26:13+03:00</lastmod>
<lastmod>2017-11-29T10:14:09+03:00</lastmod>
<priority>0</priority>
</url>
@ -145,7 +145,7 @@
<url>
<loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
<lastmod>2017-11-26T21:26:13+03:00</lastmod>
<lastmod>2017-11-29T10:14:09+03:00</lastmod>
<priority>0</priority>
</url>
@ -157,13 +157,13 @@
<url>
<loc>https://alanorth.github.io/cgspace-notes/post/</loc>
<lastmod>2017-11-26T21:26:13+03:00</lastmod>
<lastmod>2017-11-29T10:14:09+03:00</lastmod>
<priority>0</priority>
</url>
<url>
<loc>https://alanorth.github.io/cgspace-notes/tags/</loc>
<lastmod>2017-11-26T21:26:13+03:00</lastmod>
<lastmod>2017-11-29T10:14:09+03:00</lastmod>
<priority>0</priority>
</url>